gitignore: all kicad files

.gitignore

@@ -1,5 +1,27 @@
-*.?#?
-*.lck
-*.png
+# From https://raw.githubusercontent.com/github/gitignore/master/KiCad.gitignore
+# For PCBs designed using KiCad: http://www.kicad-pcb.org/
+# Format documentation: http://kicad-pcb.org/help/file-formats/
+
+# Temporary files
+*.000
+*.bak
+*.bck
 *.kicad_pcb-bak
 *.sch-bak
+*~
+_autosave-*
+*.tmp
+*-save.pro
+*-save.kicad_pcb
+fp-info-cache
+
+# Netlist files (exported from Eeschema)
+*.net
+
+# Autorouter files (exported from Pcbnew)
+*.dsn
+*.ses
+
+# Exported BOM files
+*.xml
+*.csv